人为干扰对北京野鸭湖市级自然保护区植物多样性的影响

Effects of anthropogenic disturbance on plant diversity in Yeyahu Municipal Nature Reserve of Beijing

利用物种丰富度(S)、Shannon-Wiener指数(H)、Simpson指数(D)和Pielou均匀度指数(E)、Jaccard指数(Cj)和Srenson指数(Cs)对北京野鸭湖市级自然保护区内低干扰、中干扰和强干扰3种不同干扰强度的区域进行了植物多样性的研究。在低干扰、中干扰和强干扰调查区,S依次为83、93和30,中干扰的最大,符合中度干扰假说;H、D和E的变化趋势基本一致,但S与之不是简单的一致关系;植物群落的相似性与共有物种数成正比。最后,通过湿地恢复前后植物多样性的对比,表明短期的物种恢复工作效果不明显,湿地保护与恢复工程任重而道远。

Species richness （ S） , Shannon-Wiener index （ H） , Simpson index （ D） and Pielou evenness index（ E） , Jaccard index （ Cj ） and S？renson index （ Cs ） were used to study species diversity under 3 different disturbance of Yeyahu Municipal Nature Reserve in Beijing.The 3 different disturbance intensities were low interference, interference and strong interference.Among them, species richness were 83, 93 and 30.It showed that the species richness in interference region was the largest, it accorded to the Intermediate Disturbance Hypothesis.The trends of diversity（H）, dominance（D） and evenness（E） were substantially the same , but they had no simple relationship with species richness . Meanwhile the similarity of plant communities was basically in proportional to the total number of species.In conclusion, by comparing the species diversity of plant communities before and after the wetland restoration, it was proved that short-erm recovery of the species was not obvious .The wetland protection and restoration projects had a long way to go.